Septic tank



FIG. 1 is a top, side and perspective view of a septic tank showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a view similar to FIG. 1 but showing a modification thereof; and,

FIG. 4 is a top plan view of the embodiment of FIG. 3 .

The sides opposite those shown in FIGS. 1 and 3 are identical thereto.

In both embodiments, the underside of the septic tank is plain and unornamented apart from the straps encircling the same. 

The ornamental design for a septic tank, as shown and described. 